Removable form for concrete wall construction



Aug. 7,1945.

J. T.. MlTCHELL REMOVABLE FORM FOR CONCRETE WALL CONSTRUCTION Filed Sept; 24, 1943 gage/@1122 I a o Patented Aug. 7, 1945 UNITED STATES PATENTggfOFFlCE r v 2,381,613 REMOVABLEFORM roa CONCRETE WALL g 3 Y CONSTRUCTION l i ,"Jabez Taylor Mitchell, Claremore, Okla. Application September 24, 1943, Serial No.'503,677

'zciaims. (01. 25-131) This invention relates to a wooden, metal or earthen form which maybe removed after the cement or concrete mass has hardened leaving a.

wall which is readily adaptable to many methods h of finishing on both the exterior and interior sides. This type of form, when removed from the wall will leave a wall of concrete or cement with, when viewed from the side, a honey-comb appearance. This wall mightbe designated as an inner-wall since in building construction it is anticipated that both exterior and interior sides of the Wall would be finished in a manner suitable to the builder. However the wall without finishing would be suitable to such uses as exterior wall or front of a porch, side wall for cribs, or for fences or a variety of building needs.

A special object of the invention is to so design the forms that when theyare removed a relatively light and strong wall of. concrete and reinforcing material will be left. Many pockets will be left in the wall, open at the tip to a similar pocket on the other side of the wall and suitable for inner ventilation of the wall or the insertion of insulating materials. Such a wall would also afford the opportunity for the attaching of an exterior or interior wall bya variety of methods using the original concrete wall as abase.

Another special object of the invention is to give builders a greater flexibility in wall design-* These forms can be made so that a wall with any practicable curvature can be made and buildings can be constructed without the necessity of having a corner. This would free house planners from the more" conventional design in which straight side walls with right-angle corners are largely utilized.

Another special object of the invention is to give a wider variety in window and door design but at the same time make easy a solid and airtight construction where windows and doors, or window frames and door frames are attached to the main wall of the building.

Another special object of the invention is to make easier solid concrete wall construction under certain circumstances. Such an inner-wall could be built and then it used as a rigid inner framework to which outside, conventional form could be attached for the pouring of the concrete.

Another special invention is to furnish a building with a strong inner wall, not subject to decay and having the mechanical strength to resist storms.

According to the invention these forms are made in sub-units. Two of the sub-units, prop-.

erly arranged with'regard to each otherand held together by a through-bolt or some other suitable method may be said to make up a'unit." A plurality of these units are then placed beside and upon each other, their length transversely to the length of thewall, Bracing and reinforcingwires may be used to tie the'forms together and give rigidity to: the assembled forms. The interior'open spaces or recesses formed'being filled with concrete and reinforcing materials and the forms left, on until the "concrete hardens. The formsmay ,then be removed'after removing the through-bolts 'andthe, wall will then be left as described above. L i Figure 1 is a cross sectionof wall showing the forms before they are removed. The wall'itself'is represented asbeing integral'with the foundation.

Figure 2 represents two half-units. assembled on a through-bolt. o H v Figure 3 is an end view of one form of the baseblock. V. A],

Figure 4 is a viewfrom the insideo'f. a half unit in which the central member is represented as atruncadedpyramid. I I' Figure 5 is a crosssection of acne hlf, unit which might be considered to be metal'jandthe central member cast integral with thebase -block.

Figure 6 represents base blocks, as converging toward a center of curvature of the wallwhich is under construction.

In the drawing:

Figure 1 is the vertical cross section of the removable forms and wall while the forms are still attached to the wall. The forms are represented as being made of wood. The reference numeral l indicates what might be called the base-block. The numeral 2 indicates the extension of the base-block which may be integral with the base-block or may be a separate member but secured when assembled, to the base block by the through-bolt. This extension will be referred to as the central member or neck. The small end of the neck will be referred to as the top of the one-half-unit and the end of the baseblock showing outside of forms and in contact with the head of, or nut of, the through-bolt as the bottom of the one-half-unit. The numeral 3 indicates an end of the through-bolt. The numeral 4 indicates a cross section of some reinforcing material such as wire or steel rod. This wire may be found in various positions in the cross section of the concrete material since it could be used vertically, horizontally or diagonally to secure the forms together while the conorete is being poured or worked into the recesses between the one-half-units of the forms. The numeral 5 indicates the concrete or similar material in cross section. The numeral 6 represents the position of a bolt which might be added to the concrete to secure the superstructure. to secure window or door structures or attach wall to a corner or an adiacent wall. The numeral Lindicates aconcreteffoundation which due to the nature of the material would be firmly bound to the inner-wall above. The numeral 8 indicates earthen materials surrounding the foundation.

In Figure 2 such a removable form isI-repreisented completely assembled. ,The rru neral I indicates the base-block. The numeral 2 the neck and the numeral 3 the through bolt. {The left one-half unit is numbered but the right onehalf unit is similar except that its position is reweree ii ieree ime th wianer ie th e qleame rseent e -w i e n.qt e 'ae d l s nile-i seen eitheihmwh-b n 5 31 5 2 9 it r e e ise he mad ea Q 1 .bae-

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t m a te -elm? d-th mme el.i ith iendee tb stbri shi elt zh ee fb ttei o qha .lzlesle temeeea eqe .beess eere e l i ferm eb illaleeii W m n emen melami mgalthqug base bloc'lgs thay.; qe, rec tangular,

. .fiee ev l n th im e ae eheeeiile kewmeh'mam te r witmh k or a generate piece, 1s .r'epresentedias loc .i eeeeles P ram d-e r sides i hiaf rm of lac m y-b se h r it m bee run atedmn 59 r i pher r =a-Ls Qti9n-e an ll psoi the essential feature being that it is ,removable teite ttne onctet ihe e Figure 5 is a cross section of a rr odiiied em- .bgdmentp .th inven imlbase-block .1 is hollow and the neck is integral with the basei lq an .hQll Thi Wmld J .memem term .in ease th .hal iuni wa .12 ea t am metal. f m fimenr eentelb buildin lmi as 2 kementiha w e u he., eg eii sides Q ba e .kat ieo nata le with eaqnethe bu e 4 1.1 top wiew, or .,a oneehalf .u nit i-n er. .v .valiur rettnerwel unuengon tn ctien- I the. 9

In a side wall such a bolt might be used sides of the form sloped or converged toward a point instead of a line it would give the wall under construction a dome shape.

The material from which the building forms 5 are made could with certain advantages be made of wood. These by being pre-soaked with water would not expand when in contact with the wet concrete. The Wet wood would be a source of Water for the curing concrete. Upon drying the Wooden forms gwould shrinlr sufficiently to make them removable; A metal base-block would have the advantage of weight while the forms were be- I ing laid. A combination of metal base-block and wooden neck. .or .-.;wooden base-block and metal ;l;5 ngelgwould each have its advantages. The metal neck could be handled more roughly while re- 7 moving-from wall without damage to its form.

.= ,,cl.ai,m:.

1. A removable form for concrete wall con- 20 struction consisting of two base-blocks and two th en ire M lt ,eoi s e iri v f tw .basah eq s a .ee b sdw thel vst iqeatt mem er -b tween than ame a euitable thr l heb t and Pla e ,so firenere n e 1 th Wal .un c ne m li n- "A renew b ifqrzn .e s ert in la alkpei she peq met leleme g bl are a e ife t i l m h se g9. b ing Q m a an th en ra .36 membetabe aq wee 4. A removable iormas set forth in claim-1 the baseb treat-m of wood andfthecentral membersbeing'o'fmtal. I

ifi imotamaror as. set forth inclaim'l 40' 'egcept ,that the central members are integral 'w ihthe ir respectivebases. "5 removable-form as set'forth in claim -1 ei gcept'that the central members are integral with their respective base-blocks, the-basemlocks tim d-central members being ofmetal.

1. A removable forrn' as set forth in claim '1, wherein the 'lQngitudinal sides of the base blocks converge towar'd'fthe center of the form.

f a -J. TAYLQR MITCHELL. 

